TRUCK SERVICE MANUALTM 5-4210-230-14&P-15. On negative ground vehicles, attach one end of theremaining jumper cable to the negative terminal of thebooster battery and the other end to a ground at least 304mm (12 inches) from the battery of the vehicle beingstarted (Figure 9). (DO NOT connect directly to thenegative post of the dead battery.) The groundconnection must provide good electrical conductivity andcurrent carrying capacity.On positive ground vehicles, connect jumper cablebetween positive (+) terminal of booster battery andground on the stalled vehicle.CAUTIONTake care the clamps from one cable do notinadvertently touch the clamps on the other cable.DONOTleanoverthebatterywhenmakingconnections.Avoid moving, hot or electrical hazards such asfans, manifolds and spark plug terminals whenconnecting cables.6. Be sure everyone is standing away from vehicles. Startthe engine of the vehicle with the booster battery. Wait afew minutes, then attempt to start the engine of thevehicle with the discharged battery.7. Do not operate the starter for more than 15 seconds. Waitat least 15 seconds between starting attempts to allowstarter motor to cool. If the engine does not start afterseveral cranking attempts, check for cause of failure tostart.8. After starting, allow the engine to return to idle speed.Remove ground cable connection from the vehicle withdischarged battery. Then remove the other end of thesame cable from the booster battery.9. Remove the other cable by disconnecting from thedischarged battery first and then disconnect the oppositeend from the booster battery.10. Remove and discard cloths covering battery vents.TESTINGA battery test should be performed whenever battery trouble issuspected.Battery testing will determine if:1. Battery is satisfactory and can remain in service.2. Battery should be recharged before placing it back inservice.3. Battery must be replaced.A complete battery test, as outlined below, will include thesesteps:1) Visual Inspection2) Specific Gravity (Hydrometer) Test3) Battery Capacity (Load) TestCAUTIONWhen performing battery test, observe rules ofsafety. Refer to SAFETY PRECAUTIONS.Always follow instructions of test equipmentmanufacturer.STEP 1. VISUAL INSPECTIONa. Visually inspect the outside of the battery forobvious damage such as cracked or broken caseor cover which would allow electrolyte loss.Check for terminal damage. If obvious physicaldamage is found, replace the battery. Ifpossible, determine the cause of damage andcorrect.b. Check electrolyte level. On maintenance free typebatteries, access to battery cells can be obtainedas follows:SideTerminalBatteries:Use a knife blade to cut through top plaque centersection. (Cut on dotted lines.) Pry up ends of ventmanifold with a screwdriver. Remove manifold by pullingstraight up at the ends (Figure 10). After testing cells,reinstall manifold by placing it in position and pushing itdown firmly until seated.TopTerminalBatteriesUse a knife blade to cut through the top plaque centersection on the dotted lines (Figure 11). After removal oftheCTS-2771-Page 10PRINTED IN UNITED STATES OF AMERICA